Simrad SIMRAD HS50 Manuel D’Utilisation

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Simrad HS50 Heading Sensor 
20221081 / F 
High-precision heading is derived from the fixed-distance dual 
GPS antenna arrangement in the Sensor unit, using carrier phase 
data to generate heading information independent of latitude and 
vessel dynamics. GPS position and speed are calculated from 
both antennas, which give redundant position and velocity 
sources in this product. DGPS signals may be input to the HS50 
to improve position and velocity accuracy, but has no impact on 
the heading accuracy. Refer Performance data, page 6. 
The inertial rate element provides yaw/ROT information. In case 
of short GPS outages, the inertial sensor automatically takes 
over as the prime source for heading determination until the 
GPS comes back on line. Working together seamlessly, the 
inertial and GPS elements of the system insure accurate, 
continuous and robust heading information. 
The Processing unit includes configurable output serial lines 
(three RS-232 and three RS-422) and Ethernet connections 
making it easy to distribute HS50 data to multiple users on 
board the vessel. 
The HS50 requires no scheduled maintenance or re-calibration. 
The system offers flexible configuration of the output variables 
and interface setup, depending on the vessel and application. It 
is easy to operate, install and align. 
 
The HS50 system has the following features: 
•  True heading anywhere on earth 
•  Replaces several instruments with one robust, integrated 
product 
•  Heading available in periods of GPS drop-outs 
•  20 Hz update rate on heading and rate of turn measurements 
•  80°/sec follow-up rate 
•  Three RS-232 and three RS-422 configurable output serial 
lines 
•  Output data on Ethernet 
•  Only one cable (no coax) between the mast unit and the 
Processing unit on the bridge